SI Now: MJ Day on selecting the 50th anniversary swimsuit cover
On Friday's SI Now, SI Swim Senior Editor MJ Day discusses how she knew that photo would make the cover. Also, 2014 swimsuit cover models Chrissy Teigen, Lily Aldridge and Nina Agdal discuss the importance of being on the 50th anniversary cover.

From the 2010 to 2013 issues Chrissy Teigen has done five shoots for SI Swimsuit. But never once during any of those shoots did she get a hunch that she may have just produced a cover contender. It was on her sixth shoot for SI, in the Cook Islands, when it first occurred to her that maybe, maybe that was the one. Probably not. Don't get excited . . . but maybe.

MJ Day, though, told SI Now she had a special feeling about the shot as she witnessed it happen from the other side of the camera. In the above clip, she discusses that moment that no one wanted to say out loud, but many on set could sense.

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MORE SWIMSUIT ON SI NOW: The surprise reveal | The aftermath